This video demonstrates Meltzer's Knot, a secure and reliable extracorporeal knot technique for laparoscopic surgery. The step-by-step explanation helps surgeons and trainees understand knot formation, tightening, and clinical application in minimal access surgery.

Laparoscopic suturing and knot tying require a lot of patience and practice and can be difficult, time consuming, and frustrating in spite of the advances made in the fields of instrumentation, optics, and imaging. The new technique described here is an effort to make the procedure simpler by providing extracorporeal control of one limb of the suture. It involves percutaneous placement of the needle end of the suture in the abdomen and its removal using a modified 10 cm long cloth-sewing needle.

Meltzer’s Knot is a widely used extracorporeal slip knot technique in laparoscopic surgery, known for its strength, reliability, and ease of application. Developed as a modification of the traditional Roeder’s knot, it was introduced to improve knot and loop security, particularly when using monofilament sutures such as PDS. Over time, it has become a preferred extracorporeal knot in many minimally invasive procedures due to its superior holding capacity and consistent performance.

Meltzer’s knot is characterized by a 2:3:2 configuration, which means it consists of two hitches, three winds, and two half-locking hitches. This specific geometry enhances both knot stability and resistance to slippage. The knot is tied outside the body and then advanced into the abdominal cavity using a knot pusher, reducing intra-abdominal manipulation and helping achieve precise tissue approximation.

In laparoscopic practice, Meltzer’s knot is especially useful for ligating tubular structures such as the appendix, fallopian tube, omentum, or pedunculated lesions. Studies and surgical training resources highlight that a single well-tied Meltzer knot can securely ligate structures up to approximately 12 mm in diameter. Its design provides excellent loop security and mechanical strength, which are critical for preventing postoperative leakage or bleeding.

The basic extracorporeal technique involves preparing an adequate suture length, forming the 2:3:2 slip knot configuration externally, and then introducing it into the abdomen through a port using a knot pusher. The loop is positioned around the target structure, and the knot is gradually slid down and tightened without exerting excessive traction on tissues. After proper tightening, the suture is cut, leaving a short tail. This method ensures secure ligation while maintaining tissue safety.

Clinically, Meltzer’s knot has found important applications in gynecologic and general laparoscopic procedures. For example, it is commonly used in total laparoscopic hysterectomy for vaginal cuff closure, where it provides strong, slip-resistant ligation and reliable hemostasis. Because it is tied extracorporeally, it also simplifies suturing in deep or difficult-to-access operative fields.

In summary, Meltzer’s knot represents an evolution in extracorporeal laparoscopic knotting techniques. Its predictable configuration, high security, and ease of learning make it an essential skill for laparoscopic surgeons. As minimally invasive surgery continues to expand, mastery of secure extracorporeal knots like Meltzer’s remains fundamental for safe and effective surgical outcomes.